Assembling apparatus



4 Shefs-Sheet 1 B 1'11 C. GkuPP IQTTOENEY Oct 14, 1947. E. J. BOHABOY ET AL ASSEMBLING APPARATUS Filed July 25, 1944' 4 Sheets-Sheet 2 v INVENTOES 1 EDI/A80 Y 58 H; C. GEUPP BY 4 KW 7 TTOENE Y @ct. 14, 1947. E. J. BOHABOY ET AL ASSEMBLING APPARATUS Filed July 25, 1944 w 4 Sheets-Sheet 3 MC. GEUPP 8) 7 I ,4 role/V5) Get. 14, 1947. E. J. BOHABOY'ET AL ASSEMBLING APPARATUS Filed July 25, 1944 4 Sheets-Sheet 4 F16. 8 F/aQ ATTORNEY Patented Oct. 1 4, 1 947 UNITED STATES PATENT ()FFFICE ASSEMB ING Edward .J. Bohaboy, Berwyn, and Herbert .C'.

pp, Western Springs, 111., assignors to Westo El tric C mpany, incorp a d, New York N. Y., a corporation of New York Application July-25, 1944, Serial No. 546,554

11 Claims. 1

This invention relates to an assembling ape paratus' and more particularly to an apparatus for assembling .a wave guide on a magnetron tube. In assembling magnetron tubes and wave guides for use in electronic detection devices, it is necessary that the output lead of the magnetron tube be accurately positioned relative to the wave guide for the successful and eificient operation thereof.

An object of this invention is to provide an efiective and eiiicient apparatus for accurately aligning and positioning parts for assembly.

In accordance with one embodiment of this invention, an assembling apparatus is provided for receiving a magnetron tube having an output lead thereon in telescoping relation with a wave guide, the apparatus having a standard and an anvil for supporting and positioning a wave guide in a predetermined position, and. supporting and guide members for supporting and aligning the magnetron tube with the wave guide. A gage member and means for moving the magnetron tube tn reagainst are provided for adjusting the telescoping relatiQn vQf'the output lead and the Wave guide, after which clamping members of the apparatus are actuated to clamp together .the c p rati ove lap ing flan es f the magn tron tube and wave guide so that .they may be drilled and riveted together while the magnetron tube and the wave gllide'are held in aligned position in the apparatus.

Other objects and advantages of the invention will .be apparent from the following description taken in conjunction with the accompanying drawin s i l t at g a p ferred e bod m nt of the invention, in which 7 I Fig. 1 is a plan view of the apparatus shown in open position to receive the magnetron tube and the wave guide to be assembled;

Fig. 2 is airont view of the apparatus shown in Fig. 1 with portion shown in section and taken an the l ne' -2 of Fi .1.;

Fig. 3is aplan View of the apparatus in closed position showing the wave guide and magnetron t be as emble position thereon;

Fig. l is a vertical lateral section of the apparatus showing the magnetron tube in place and taken on the line 44 of Fig. 3;

Fig. :5 is a central vertical longitudinal section through the apparatus showing the wave guide and magnetron tube in assembled position thereon and taken on the 'line5+5 of Fig, 3;

Fig. 6 is a. vertical longitudinal sectional view lithe apparatus takenon the line 6-6 of Fig. '3; Fig. '7 is a vertical lateral section through the apparatus taken on the line l. of Fig. 3 showing the cooperating flanges of the wave guide and the magnetron. tube clamped in position on an anvil of the apparatus; i

Fig. 8 is a plan View showing the magnetron tube and -:wave guide in assembled relation;

Fig. 9 is a plan view of the magnetron tube;

Fig, 10 isa plan view .of the wave guide;

Fig. "11 is a fragmentary vertical lateral section showing a portion of the apparatus illustrated in Fig. 7 with riveting dies in position for riveting thelcooperating flanges of-the magnetron vtubeand the wave guide together; and

1-2 is .a detail View of a gage used in check? ing the alignment of the wane guide with the magnetron tube.

Referring to .the drawings, particularly Figs. 8, 9 and '10, :there-isshown a magnetron tube, generally indicated by the reference numeral .1 5, come prising a shell portion t6 containing a cathode and an anode for generating ultra-high frequency radio waves, input leads ll, and an output lead 1-8. The output lead it .extendsoutwardly from the shell 16 and is enclosed within and coaxial with a glass envelope or tube It, which is con.- nected to the shell 16 by means of .a metal sleeve 21] having an enlarged circular shoulder portion 2:]. The output lead 13 is .ofiset with respect to theshell iii .sothat a part of the circular shoulder portion 2i extends above the top surface of the shell {[6, providing a vertical gauging shoulder :22, as shown particularly Fig. 5. A pair of spaced flanges. 25 and 2:6 is formed on the magnetron tube, the ilorward portions .of which are adapted to receive a cooperating flange on the wave guide, later to be described.

The wave guide, generally indicated by the ref-- erence numeral 30, shown in Figs. 5, 8 and l d, comprises aligned cylindrical tubes 3i and 8:2 ;pro J'ecting from the flat side Walls of a rectangular hollow tube 3.3. One end of the hollow rectangular tube 3.3 is closed by the end wall 34 and the other end has formed thereon a circular flange 3.5,, to which additional sections or xtensioils of the Wave guide may be attached, Thus, by the tubes 31 .32, a cylindrical chamber is formed intersecting a rectangular chain-her formed by the rectangular tube 3.3. A bar is brazed to the cylindrical tube 3i and extends on opposite sides thereof to form attaching flanges 3E and 3?, the left hand flange 3.6 of Which may be secured tot-he flanges 2:5 and '26 of the magnetron tube. Angle plates 38 are secured on either side of the right hand flange .31.

The wave guide is assembled on the magnetron tube with the tube 31 telescoping over the glass envelop l9 and the output lead l8, wi-th the end of the tube 3! engaging the circular shoulder 2i, and with the flange 38 of the wave guide fitting inbetween the flanges 25 and 26 of the magnetron tube and being attached thereto by rivets 3-9. The end of th output lead I8 of the magnetron tube is positioned coaxially of the tubes 3! and 32 and slightly beyond the central plane passing through the greater dimension of the rectangular tube 33, as shown in Figs, 5 and 8. It is important that the end of the output lead l8 be accurately aligned with respect to the tube 3| and the rectangular tube 33 of the wave guide. By making the magnetron tube so that its output lead terminates a definite distance from the shell of the magnetron tube and by providing an exterior gaging shoulder on the magnetron tube a definite distance from the end of the output lead, it is possible to assemble and accurately align the magnetron tube and the wave guide without using the end of th output lead as a reference point during the assembly. Thus, the accurate longitudinal alignment is accomplished by providing the external gauging shoulder 22 on the magnetron tube at a predetermined distance from the end of the output lead I8 and mechanically gauging the position of the wave guide 30 relative to the shoulder 22.

The assembling apparatus comprises a base 38, on one end of which a vertical standard 4| is provided for receiving and positioning the wave guide 39. The standard 4| is rectangular in horizontal cross section and of such dimensions as to fit within the hollow rectangular tube portion 33 of the wave guide and permit lateral adjustment of the wave guide thereon. Means are provided for securing the wave guide on the standard All and for accurately positioning the same longitudinally of the base, which comprises a pair of spherical members 42 for engaging the inner walls of the rectangular tube 33 and which are adapted to be spread apart by a vertically movable plunger 43 and a spherical member 4:! fitting within a vertical bore in the standard (ii. The plunger 43 rests upon and is adapted to be moved up and down by an eccentric 45 mounted in the base and actuated by a handle 36. The base 40 surrounding the standard 4| is provided with a flat surface 41. Spaced from th standard 4! and extending upwardly from the surface 47 of the base is an anvil 48 having a pair of horizontal supporting surfaces at and 58 separated by a V-shaped groove 5|, as shown particularly in Figs. 1 and 2. A pair of apertures 52 extends downwardly from thesurfaces 49 and 5e and meets enlarged recesses 53 located in the bottom of the base M), as shown in Figs. 6 and 7.

The base 40 is apertured at 55 (see Figs. 1, 4 and 5) to receive therein a vertically adjustable supporting member or block 55 for supporting th magnetron tube. The block 55 is mounted on the eccentric portion of a shaft 51, rotatably mounted in the base, the shaft 51 passing through an aperture 58 in the block 55 and having an operating handle 59 at one end thereof. The block 55 is guided in its vertical movement by a pin 60 fixed in the base 40 and extending in a slot 5| of the block 56 and also by the walls of the aperture 55, which engage the end walls of the block 56. Guide members having vertically disposed shoulders 63 and 64 are provided on the base for receiving therebetween the shell portion of the magnetron tube to laterally position the magnetron tube in alignment with the wave guide (see Figs. 1 and 4). For locating the magnetron tube in approximate position longitudinally of the assembly apparatus, a pair of locating pins 65 and E8 is provided, the pins extending upwardly from the base, as shown in Figs. 1 and 5, to receive the shell portion it of the magnetron tube and permit a small adjustment thereof. The base 40 is provided with a pair of spaced lugs 10 for receiving a pin TI, on which is hinged a bridge member '12. The bridge member i2 is adapted to be moved from the open position, as shown in Fig. 2, to a closed position, after the magnetron tube has been placed in position in the assembling apparatus, as shown in Fig. 4. The free end of the bridge member 12 is adapted to rest upon and be supported by shoulders #3 formed in upwardly extending post members 74 formed on the base ea. The upper end of th members 14 engages the sides of the free end of the bridge member 12 to prevent lateral displacement thereof. The bridge member 12 is provided with a pair of shoulders 75, which are adapted to be engaged by hooked latches T6 to hold the bridge 12 in closed position, the latches being pivoted to the base at H and normally urged in a counterclockwise direction by springs 18, as shown in Fig. '7. A block 89, adapted to engage the upper surface of the shell l6 of the magnetron, is rotatably connected to the lower end of a thumb screw 8! engaging a threaded aperture in the bridge member 82. The block 8!) is provided with a pin 82 engaging in an aperture in the bridge member 12 for the purpose of preventing the block 89 from rotating relative to the bridge 82 during the adjustment of the thumb screw 8!.

In order to locate the magnetron tube accurately longitudinally of the apparatus, a gauge member or finger 84 is provided on the underside of the bridge member l2, which is adapted to engage the vertical shoulder 22 on the magnetron tube 15 (Fig. 5). A lever 85, pivotally mounted on a stud 86, is provided to engage the magnetron tube and move it until the shoulder 22 thereon engages the gauge finger 84 to accurately position the magnetron tube longitudinally of the apparatus. The lever 85 is provided with a notch 81 forming a, pair of spaced fingers 88, which straddle the tube 3| of the wave guide and are adapted to engage the vertical wall of the shell portion [5 adjacent the circular shoulders 21 of the magnetron tube (Figs. 5 and '7). On its upper end, the lever 85 is provided with a thumb screw 89 engaging a threaded aperture therein and adapted to bear against the bottom 9| of a recess in the bridge member 12, so that, upon turning the thumb screw 89, the fingers 83 of the plate 85 may be moved to clamp the magnetron tube against the gauge finger 84 or release the same.

Clamping members or levers and 96, pivotally mounted as at 91 and 98 in the bridge member 12, are provided for clamping the cooperating flanges of the magnetron tube and the wave guide tightly together after the magnetron tube and wave guide have been aligned. Each of the levers 95 and 96 is provided at one end thereof with a thumb screw 99, which engages a threaded aperture therein and which is adapted to engage the end of a post I00 carried by the base 40. The opposite end of each lever 95 and 96 is enlarged to form a head I02 having a rounded bottom surface for engaging the flange 25 and plate 38, the head Ill-2 being provided with a pair of apertures I03 in axial alignment with the apertures 52 in the anvil when the bridge member 12 is in closed position, as shown in Fig. '7. A drill guide I05 is removably mounted on the head I02 on lever 95, having a pair of hinged spring-biased hooked levers I06 for engaging pro- J'ections I01 on the sides of the head I02 for retaining said drill guide in place; The drill guide; has a: pair of: tubular drill bushings: "18* extending downwardly, therefrom into. the ap.er-= tures [03- ofthe head I02: for. the purpose of. guiding. a drill with .respect to the flanges. 25,;

26;, and 36 I during 1 the drilling operation;

After theholes have been: drilled throughjthes flanges,25;, 2B and 3.6.of; the wave guideand mags netronr tube; rivetsmay be placed, therein-1 and-i a-..lower punch or anvil H inserted in the: apera ture- 5.3;.the anvil H0 having a. pair of rivet-emgaging. projections for supporting the rivets (Fig; 11). A pair of upper punches: I'll are adapted.

tobeinserted in the apertures: I03 after the drill guide: has been removed and, on the downward movement of same, actuated as. by means of a:

ram H 2; the. rivets. will be headed to securely fasttezrthe flangesin assembled relation.v

In using the assembling apparatus; the apt paratusmay. be supported on a table with-the1 righthandend, as viewed in Fig. 5; elevated at an angle of about 45 degrees to facilitate the assembling of the magnetronwith the Wave guide.

In assembling the wave guideon the magnetron.

tube. the parts may. be positioned as shown in Figs. 9 and 10, with the tube 3.1 in alignment with theoutput lead I 8; after which the wave guide may bemoved into telescoping relation therewith. so that the end: of the tube '3] engages the cir-' cularshoulder 2i andisz adjacent the shell portion l67and with thefiange 36'of the wave guide interposed between the flanges and.26 of the magnetron tube. With the bridge member of f the: assemblingapparatus in openposition, the waveguide-andmagnetron tube in telescoping relation. are-placed in position on the apparatus so that the rectangular tube 33 of the wave guide fits over thestandard' ll with the flange 35'spaced' slightly from'the base, as shown in Fig. 5; Theshell por=-- tion I 6: of the magnetron. tube will'rest on the supporting member or block :58 and will be positioned laterally by the shoulders 63' and and will be located longitudinally. in approximate'posi tion by the-pins 65 and 66: The flanges 25; 36

and.26-,.-andfiange 3'l'andzplates 3B'will rest on.

the" supporting surfaces '49and respectively, of the anvil 48. portedrby; anvil:.surfaces'49: and 50. and by the engagement of the end of tube 3| with the circular shoulder Zlofthemagnetron tube while the magnetron tube issupported by. the block 56} and the anvil surface-49:

The wave guide is thus sup- Thebridge member may' then be moved'to its closed position; which will locate the gauging finger 84 adjacent to and: in alignment with the shoulderw22,ofithe-magnetron tube'and'will locate thefingers 88 ofthe-lever 85. adjacent to and opposite the wallof= the-shellportion 16; The

thumb screw 39 may then beeturned to move the fingers .88 into engagement with a vertical wall 'of s the shell I6 and move the magnetron tub-e until it is stopped by the. engagement of the shoulder 22 .with thegauge finger. 84. By this--means,- the end of the output lead 18-01 the magnetrontube willbe very. accurately positioned relative to the rectangular tube 33 of the wave guide 36. The

output lead is-next aligned axially with respect- With the apparatus disposed at to the tube 3!. a 45. degree angle,- the operator may look through the open end of the tube 32 and observe the position of the glass envelope 19 with respect to the ci ularv tubes 3| and32. The operator, if necessary, maymanually move the wave guide laterally untiLit appears to be in lateral alignment with the glass envelope [9 and'the output. lead l8;

By, 'turningthe .handle 5 9-. and; thumb screw 8 I hegmayrai'seror. lower the shell 16 sozthat the: magnetron tube. will pivot slightly with respect to thezwaveguide aboutthe circularshoulder 2 I and: the end of thetube 32 to cause a vertical moverment ofthe output lead. l8 with respectto the cylindrical. tubesv 3| and. 32 of? the. wave guide; When; the. glass. envelope: l9. appears? to be im axialalignmentwith the tubes:v 31 and 32-; a:tubu:--- lar gaugel20'may be inserted between theiglass; envelope." I 9; and the section 32 of the waveguide: and; if; there. is-no interference with: the. insertion: ofsaid'gage l20; the. glass;envelope l' andlthef output lead: [-8: are in coaxial alignmentwit'h the; tubes 3it'andi32 orithe'waveguide; Thegauge' lzflcis removedabefore proceeding: with subsequent:- operations:

Durin the aligning of the output; lead." lflfandra the; tubes 3*? and 32, the flanges: 25? and .25 one the magnetron? tubeand the fiange 3650p theiwave'r guiderare free to move slightly relative tor-eachother. After the alignment of the" parts? justdescribed, the wave 'guide I may be secured: in place? by actuatingthehandle 46 of. the eccentric; 4-55..

The heads m2 of the levers and: 96;,whichr previously were spaced .from th'e-flange 25 an'dstherplate.-39, .or were lightly-engaging. them, may now" bemoved to'clamp the: cooperating flanges 2-5;. 361 and 26 and the plates 39 and-'theflange:-3?? against the surfaces-49: and 50; respectively, of the anvil 48. This is. accomplished: by turning;v the. thumb screws 99 at-the other end of the levers: 95 and 962. The'magnetron tube and therwavei guide. are thus, very, accurately aligned. and; clampedtogether in aligned relation and the at taching flanges may now bedrilledand'riveted: together. to maintain this alignment. The; as-- sembling apparatus,v with the" assembled and! aligned. magnetron tube and wave guide therein may. bew removed 1 from the assembling station: to a. drillflpress where apertures fOI:' receiving the: rivets may be drilled through the attaching; flanges. 36, 2.5. and 26 of the Waveguide and magnetron. The drill guide l 05 is removed from:- the head. [62 after the" rivet holes? have been v drilled. inv the flanges; after which rivets: are inserted and riveted in'asubsequent operation 'by meansof the punches H0 and IN; Thus;-.the' Wave guide" is accurately alignedand securelyassembled to themagnetron tube and: the bridge member 72 .maybe. released and: the& assembled magnetron and wave guide removed from the assembling apparatus.

What is -claimed is:

1. An assembling-apparatus comprising a-bas'e: means for securing a tubularmember havingan: attaching flange in a predetermined position on the base, an. adjustable support mounted" on said base for supporting an element in telescoping relation with said tubular member, said element having an attaching flange in overlapping rela= tion with the attaching flanges of saidtub'ul'ar. member, an apertured anvil mountedon said-base for supporting said attaching flanges-in overlap pingrelation; abridge member-hinged to said base: and movable to a closed position, means for locking said bridge member in-closed' position; a. gage: finger on said bridge member; means' mounted'on said bridge member for moving said element against said-gage finger to longitudinally, position said element, means carred by saidbridge" member-for. engaging the element and in coop-- pivoted to the bridge member I for clamping. the* attaching; flanges: of the: tubular member'" and" the element against the anvil, said clamping members having apertures therethrough in alignment with the apertures in the anvil, and means for actuating said clamping members.

2. An apparatus for assembling a wave guide having a rectangular tubular portion and an angularly disposed cylindrical tubular portion with an attaching flange on a magnetron tube having an output lead and cooperating attaching flanges, said apparatus comprising a base, a standard mounted on the base for receiving the rectangular tubular portion of the wave guide, means on said standard for securing the rectangular tubular portion on the standard, an adjustable support mounted on the base for supporting the magnetron tube with the output lead thereof in telescopic relation to the cylindrical tubular portion of the wave guide, means mounted on said base for adjusting said adjustable support to axially align the output lead with the cylindrical tubular portion of the wave guide, guide members associated with said base for laterally positioning the magnetron tube in alignment with the wave guide, an anvil on said base for supporting the attaching flanges of the magnetron tube and the Wave guide in overlapping relation, said anvil having apertures therethrough, a bridge member hinged on the base, means for locking the bridge member in closed position, means on the bridge member for adjusting the telescopic relationship of the magnetron tube and the wave guide, an adjustable member carried by the bridge member and cooperating with said adjustable support for holding the magnetron tube in aligned position, clamping members pivoted on the bridge member for'clamping the attaching flanges of the magnetron tube and wave guide against the anvil, said clamping members having apertures therethrough in alignment with the apertures in the anvil, and means for actuating said clamping members.

3. In an assembling apparatus for assembling a hollow member in predetermined telescoping relation with an element, a base, means on said base for securing the element in a predetermined position and with a portion thereof in telescoping relation with said hollow member, and means for securing said hollow member in a predetermined position relative to said element comprising a standard on said base adapted to receive a portion of said hollow member thereon in loose telescoping relation to permit a substantial universal movement of the member FWith respect to the standard, a pair of gripping members mounted on said standard for movement in opposite direction and shaped to establish a point contact each with the walls of said portion of said hollow member, and means for moving said gripping members into gripping relation with opposite walls of said hollow memben l. An assembling apparatus for assembling an element having an attaching flange in telescoping relation with a hollow member having an attaching flange comprising a base, means on said base for securing the element in a predetermined position and with a portion thereof in telescoping relation with said hollow member, means for securing said hollow member in a predetermined position relative to said element comprising a standard on said base adapted to receive a portion of said hollow member in loose telescoping relation to permit a substantial universal movement of the member relative to the standard, a

pair-of gripping members mounted on said standard shaped to establish a point contact each with the walls of said hollow member, and meansior moving said gripping members into gripping relation with opposite walls of said hollow member, an anvil on said base for supporting the attaching flanges on said element and said hollow member in overlapping relation, means on said base including a movable clamping member for clamping said flanges against said anvil, tool guide surfaces on said clamping member for guiding a tool relative to the attaching flanges, and tool guide surfaces on said anvil for guiding a tool relative to the attaching flanges.

.5. An assembling apparatus for assembling an element having an attaching flange in telescoping relation with a hollow member having an attaching flange comprising a base, means on said base for securing the element in a predetermined position and with a portion thereof in telescoping relation with said hollow member, means on said base arranged to telescopingly engage a portion of said hollow member for securing said member in an adjusted position with respect to said element and with the attaching flanges of said element and said hollow member in overlapping relation, an anvil on said base for supporting said attaching flanges, means on said base including a member movable above said anvil into engagement with said flanges, tool guide surfaces on said anvil for directing a tool relative to said flanges, tool guide surfaces on said movable member for guiding a tool relative to the flanges, a tool guide detachably mounted on said movable member in engagement with said tool guide surfaces thereon, andlatching means for releasably securing said tool guide on said movable member.

6. In an assembling apparatus for assembling an element into a predetermined telescoping relation with a tubular member having a hollow lateral arm, a base, means on said base for securing the element in a predetermined position on the base and with a portion thereof in telescoping relation with the tubular member, a standard on said base in a predetermined spaced relation to said securing means for receiving the lateral arm of said tubular member in loo e telescoping relation to permit a substantial universal movement of the arm with respect to the standard, a pair of movable spherical members mounted on said standard, and actuating means including a movable member centrally located on the stand- I ard for imparting equal movement in opposite directions to said spherical members for grippingly engaging opposite walls of the lateral arm to secure the tubular member in adjusted position transversely and a predetermined position longitudinally relative to said element.

'7. An assembling apparatus for assembling an element having an ttaching flange into a predetermined telescoping relation with a tubular member having a hollow lateral arm and an attaching flange comprising a base, means of said base for securing the element in a predetermined position and with a portion thereof in telescoping relation With the tubular member, means on said base in a predetermined spaced relation to said element securing means for receiving the lateral arm of said tubular member in loose telescoping relation permitting adjustment of said tubular member relative to the element and including a pair of gripping members movable into gripping engagement with opposite walls of said lateral arm for securing the tubular member in a predetermined position longitudinally and an adjusted position transverselyrelative to said element,

an anvil for supporting the attaching flanges of the element and the tubular member in overlapping relation, means on said base including a pivoted clamping arm for clamping said flanges against the anvil, tool guide surfaces on said clamping arm for guiding a tool relative to the attaching flanges, and tool guide surfaces on said anvil for guiding a tool relative to the attaching flanges.

8. An assembling apparatus for assembling an element having a flange into a predetermined telescoping relation with a hollow member having a lateral arm and a flange comprising a, base, means on said base for securing the said element in a predetermined position, and means on said base for telescopingly receiving said lateral arm and including a pair of gripping members movable into gripping ngagement with the walls of said arm for securing the tubular member in a predetermined position with respect to said e1ement, an anvil on said base for supporting the flanges of said element and said hollow member in overlapping relation, means on said base including a movable arm for clamping the flanges against said anvil, tool guide surfaces on said anvil for guiding a tool relative to the flanges, tool guide surfaces on said movable member for guiding a tool relative to the flanges, a drill guide detachably mounted on said movable clamping member in engagement with said guiding surfaces thereon, and latching means for releasably securing said drill guide on said clamping member.

9. An assembling apparatus for assembling an element having an attaching flange in predetermined telescoping relation with a hollow member having an attaching flange comprising a base, means on said base for securing the element in a predetermined position with a portion thereof in telescoping relation with said hollow member, means on said base for securing said hollow member in a predetermined position relative to said element comprising a standard on said base adapted to receive a portion of said hollow member in loose telescoping relation to permit a substantial universal movement of the member with respect to the standard, a pair of gripping members mounted on said standard and shaped to establish a point contact each with the walls of said hollow member, and means for moving said gripping members into gripping relation with opposit walls of said hollow member, an anvil on said base for supporting the attaching flanges on said element and said hollow member in overlapping relation, and means on said base including a movable clamping member for clamping said flanges against said anvil.

10. An assembling apparatus for assembling an element having an attaching flange into a predetermined telescoping relation with a tubular member .having a lateral arm and an attaching flange comprising a base, an adjustable member on said base engageable with the lower face of said element for supporting said element with a portion thereof in telescoping relation with said tubular member, guide members on said base for preventing lateral movement of the element, a bridge member pivoted on the base and movable to a closed position to overlie a portion of said element, means for locking said bridge in closed position, a gage surface on said bridge disposed in a predetermined position longitudinally of said base, means on said bridge for clamping the element against the gage surface to position the element in a predetermined position longitudinally of said base, an adjustable member on said bridge engageable with the upper face of the element, said adjustable members engageable with the lower and upper faces of the element being vertically adjustable to adjust and clamp said element in adjusted position, a standard on said base in a predetermined spaced relation to said gauge surface for receiving the lateral arm of said tubular member in a loose telescoping relation to permit a transverse movement of the arm relative to the standard, and means on said standard movable into gripping engagement with opposite Walls of said lateral arm for securing aid tubular member in adjusted position laterally and a predetermined position longitudinally relative to said element.

. 11. An assembling apparatus for assembling an element having a flange into a predetermined telescoping relation with a hollow member having a lateral arm and a flange comprising a base, an adjustable member on said base engageable with the lower face of said element for supporting said element with a portion thereof in telescoping relation with said hollow member, means on said base for laterally positioning the elements for movement in a vertical plane, a bridge member pivoted on the base and movable to a closed position to overlie a portion of said element, means for locking said bridge in closed position, means on said bridge for clamping the element in a predetermined position longitudinally of said base, an adjustable member on said bridge engageable with the upper face of the element, said adjustable members engageable with the lower and upper faces of the element being vertically movable to adjust and hold said element in adjusted position, means on said base in a predetermined spaced relation to said clamping means EDWARD J. BOHABOY. HERBERT C. GRUPP.

REFERENCES CITED The following references are of record in the file of this patent:

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